Results 1 to 10 of about 565,011 (150)

Wideband Self-Calibration Method of Inductive CTs and Verification of Determined Values of Current and Phase Errors at Harmonics for Transformation of Distorted Current [PDF]

open access: yesSensors, 2020
Self-calibration of a designed wideband inductive current transformer (CT) was carried out in the ampere-turns condition. This method does not require a reference transducer. The values of current and phase errors at the harmonics of frequencies from 100
Ernest Stano, Michal Kaczmarek
doaj   +2 more sources

Calibration of On-Board Energy Measurement Systems Installed in Locomotives for AC Distorted Current and High Voltage Waveforms and Determination of Its Uncertainty Budget [PDF]

open access: yesSensors, 2021
Periodic calibrations of Energy Measurement Systems (EMS) installed in locomotives must be carried out to demonstrate the required accuracy established in the EN 50463-2 standard according to European Parliament and Council Directive 2008/57/EC on the ...
Abderrahim Khamlichi   +4 more
doaj   +2 more sources

Assessment and Treatment of Distorted Schemas in Sexual Offenders [PDF]

open access: yesTrauma, Violence, and Abuse, 2013
The aim of this review is to examine the literature related to the assessment and treatment of sex offenders’ distorted schemas. Where appropriate, the review draws upon current insights from the field of social cognition to aid in the critical ...
Louise Dixon, Anthony Beech
exaly   +4 more sources

Review of Measuring Methods, Setups and Conditions for Evaluation of the Inductive Instrument Transformers Accuracy for Transformation of Distorted Waveforms

open access: yesEnergies, 2023
In this review article, ideas for the development of measuring methods and setups to test inductive instrument transformer accuracy for the transformation of distorted current or voltage are analyzed. This article proposes limiting values for ratio error
Michal Kaczmarek, Ernest Stano
doaj   +1 more source

Challenges of Accurate Measurement of Distorted Current and Voltage in the Power Grid by Conventional Instrument Transformers

open access: yesEnergies, 2023
Power grids are a combined system where the electrical energy produced by the power plants is transmitted to consumers. This forms a specific interdependence where the recipients have a significant impact on the power quality.
Michal Kaczmarek, Ernest Stano
doaj   +1 more source

Operation of the Electronic Current Transformer for Transformation of Distorted Current Higher Harmonics

open access: yesEnergies, 2022
This paper evaluates an electronic current transformer’s wideband accuracy in the transformation of distorted current harmonics. The tests were performed in the range of frequencies from 50 Hz to 5 kHz.
Michal Kaczmarek   +2 more
doaj   +1 more source

The Method to Determine the Turns Ratio Correction of the Inductive Current Transformer

open access: yesEnergies, 2021
This paper presents the method for evaluation of the turns ratio correction of the inductive current transformer using the magnetization curves determined at the non-load state and in the load conditions.
Ernest Stano
doaj   +1 more source

The Performance of the High-Current Transformer during Operation in the Wide Frequencies Range

open access: yesEnergies, 2022
This paper presents the performance of the 26 kVA inductive high-current transformer (HCT) during operation in the frequencies range of transformed harmonics from 50 Hz to 5 kHz.
Michal Kaczmarek   +2 more
doaj   +1 more source

The Reference Wideband Inductive Current Transformer

open access: yesEnergies, 2023
The aim of this paper is to show that the developed inductive current transformer may ensure the required wideband transformation accuracy and it may be applied, as the reference source, in the measuring system for the evaluation of the transformation ...
Michal Kaczmarek   +2 more
doaj   +1 more source

Evaluation of the Current Shunt Influence on the Determined Wideband Accuracy of Inductive Current Transformers

open access: yesEnergies, 2022
This manuscript presents performed laboratory studies and the analysis of the impact of current shunt values used in the differential connection on the wideband metrological performance of inductive current transformers.
Michal Kaczmarek   +2 more
doaj   +1 more source

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